Pressure-responsive device



Nov. 3 1925.

F. H. BROWN PRESSURE RESPONSIVE DEVICE Original Filed Q fawn or.

To aZl whom it may concern:

Patented'rl ov. 3, 7

I rnancrs n, snows, or ennuonnnu, PENNSYLVANIA.

'rn'msunn-nnsronsivn mavzcn.

I i l i 4 Application filed larch 85, 1920, Serial No. 888,885. Renewed Kay 10, 1928.

Be it known that I, FRANOIS H. BROWN,

a citizen of the United States, residing at ulenolden, in the county of Delaware and State of Pennsylvania, have invented an Improvement in Pressure-Responsive Devices, of which the following description, n con-- nection with the accompanying drawin s, 18 a specification, like characters on the rawin re resenting like parts.

he invention to be hereinafter descr bed relates to differential pressure respons ve devices, and more particularly to devices responsive to variations in static and kinetic fluid. ressures. The dance may behemploye for indicating, registering, measur- 1n regulating, and. other purposes.

eretofore, devices have been employed for transmitting differential static and kinetic fluid pressures. j For example, in

steam generators the steam supply mainleadin therefrom has been provided with an o ce plate, and a ipe has been led from the main at one s1 e of the plate to transmit static pressure'of the steam to a regulating instrumentality, and a pipe has pressure toithe regulatin device.

been led of the orifice plate to transmit kinetic steam The steam main may, constructed of "sections having adjacent flanges, and the orifice late may be introduced between and secured to said flanges. It is also necessary to specially construct the steam main sec- ,tions' so as to connect the statlc steam pressure pipe and the kinetic'steam pressure pipe thereto. To connect said pipes as described, is an inconvenient operation, and in practice it is. found that in many instances it is diflicult to obtain the static and kinetic steam pressure variations thereby.

One of the purposes of the .present invention, therefore, is to provide a simple and efllcient' device which may be quicklyand readil introduced into the steam main, and where y the static and kinetic steam or other fluid pressure variations may be efliciently received and transmittedto any instrumen tality to be operated or afiected thereby.

' Also, in some cases it is desirable that the steam shall flow through the main in one' om the main at the o posite side" direction, and in other cases in the opposite direction. Heretofore, with the orifice plate and pressure transmission pipes connected to the main as described, the construction has been adapted to the flow of s the steam through the main in one direction only, and if it is desired to have the steam flow in the opposite direction, it has been necessary to disconnect the pipes, exchange the positions thereof, and reconnect the same to the main.

Another purpose of the invention, therein view, the character of the invention may,

be best understood b reference to the followmg description 0 one good form thereof shown in the accompanying drawing wherein 4 i Fig. 1 is a sectional View through a device embodying the invention and shown secured to a mam; and

Fig. 2 is a vertical section taken onthe line .2-2 of Fig. 1.

The device embodying the invention ma be applied to a plpe or conduit throng which steam' or other fluid pressure may flow. In the present instance, a steam supply main 1 is shown, which may lead from a steam generator of usual construction, and therefore, unnecessary to show herein. This main may be formed in standard sections 3 and 5 having flanges 7 and 9.

The static and kinetic steam pressure responsive device may be conveniently introduced between the flanges of said pipe sections. prises .a plate 11 which may have an external diameter corresponding to the diameter of the flanges 7 and 9. This plate may be secured between said flanges by any suitable means, in the present instance, in the form of bolts 13 extending through said plate and flanges. The plate may be provided with a central orifice 15 substantially smaller than the internal diameter of the steam main.

. One reason why the kinetic steam pressure One good form of thedevice com-"* transmission pipe has not satisfactorily received and transmitted variations in the kinetic steam pressure, is due to the fact that this pipe has been connected to the" steam main at one point, and at a substantial distance from the orifice of theplate. The

present invention contemplates that the kinetic steam pressure which is' a negative pressure, may be taken and transmitted from the entire periphery of an orifice or passage surrounding the orifice. In the present instance, this passage is in the form of a.

*"edges 19 of the orifice preferably are bev- 'elerl; so as to present sharp lines of juncture with said groove, thereby contributing "to efficient transmission of the kinetic steam pressure variations to the groove 17 The orifice may be of any desired shape or contour, but for purposes of illustration, in the present instance, it is shown as clrcular. Communicating with the groove 17 is a port 21 conveniently extending radially from said groove toward the periphery of the.

plate. The outer end portion of this port may be counterbored and tapped to receive a pipe 23 for transmitting t e kinetic pressure to the instrumentality desired.

Asstated, one of the purposes of the invention is to provide a device which may be employed when the steam or fluid isflowing through the main in either direction. To accomplish this, in the present instance, the orifice plate may be provided with-a port 25 having a mouth 27 at one side of the orifice plate, and a port 29 may be provided having a mouth 31 atthe opposite side of said plate. The outer end port ons of these ports may be counterbored and tapped to receive Y pipes 33 and 35 communicating with a horizontal pipe-37, communicating in turn with a vertical pipe 38 for transmitting the static steam pressure to the point desired. The

ipe 33 may have a valve 39, thepipe 35 may have a valve 41, and the pipe 3 may have valves 43 and at opposite sides of the pipgs' 33 and 35. The construction is such t when the steam is flowin through the main in the direction indicate by the arrow 47, the valve 39 maybe closed, and the valve 41 may be opened, so that the po1t\ 29 will transmit the static pressure of the team from the main at the right of the orifice p ate 4 to the pipe 35 and thence to the pipes 37 and 38. The direction of f the transmission. of the static steam pressure through the pipe 37 will depend upon whether the valve 43' or the valve 45 is opened.

If the steam is flowing through the main in the direction indicated by the arrow 49, the valve 41 will be closed. and the valve 39 will be opened, thereby admitting the static steam pressure at the left of theiorifice plate throug the port 25 andthe pipe 33 to the pipe 37. The direction of transmission of the static steam ressure through the latter pipe will depen upon whether the .valve 43 or thevalve 45 is opened..

The construction is such that the staticv and kinetic steam pressure variations will sincethe circumferential groove 17 and port 21 communicate directly with this 011fi06,-

the variations in the kinetic steam pressure will-be defimtely received and transmitted tlierethrou'gh to the instrumentality to be i operated in response to'such variations. The mouths of. the ports for-transmitting static steam pressure variations may be located in the orifice plate a substantial distance within the main, and since they face the, direction in which the steam is flowing, they will efliciently' serve to receive and transmit the variations in the static steam pressure, and the ports 25 and 29 communicating with the pipe 37 through the branch pipes 33 and.

35 will definitely alternatively transmit the variations in the static steam pressure to the instrumentality tobe controlled'thereby.

It will be understood that the invention is 'not limited to the specific embodiment shown, and that various deviations. may be made therefrom without departing from the spirit and scope of the appended claims.

What is claimed is:'-'

1. A device of the character described, comprising a plate having an orifice therein, a circumferential groove in said plate communicating with said orifice, a port extending through said plate from the riphery thereof to said groove, a port extendiiig from the periphery of said plate having a mouth opening at one face of said plate, and a ort extending from the periphery of said p ate having a mouth opening at the opposite face of said plate. p

2. The combination with a fluid suptply ce,

vpipe,.of a-plate therein having an on and acircumferential groove openin into said orifice, a ort communicating-wi said groove adapte to lead to'a pi e to transmit kinetic fluid pressure from sai fiuidsupply pipe, and a pair of ports having mouths opening at opposite facesv of said plate for alternatively transmitting static fluidpressure from said fluid supply to the direction of flow of fluld in" the'latter.

3. A device for transmitting static and I kinetic fluid pressures, comprising means having an orifice therein, a contlnuous groove communicatmglwith said orifice throughout the perimeter of the orifice," a port com;

mumcatmg with said groove for transmitv ipe according 80 .at' opposite sides of said groove being ting kinetic fluid ressure, and a port,. openthroug ing at one side 0 said means for transmitting static fluid pressure.

4. A device of the character described, comprising a plate adapted for insertion between two pipe sections and having an orifice therein, a groove communicating with the orifice throughout the perimeter thereof, a port extending from the groove to the outer edge of the plate for transmitting kinetic fluid pressure, and a port opening at a face of the plate and extending to the outer edge of the plate for transmitting static fluid pressure directl from one of the pipe sections through t e plate. I 1

5. A device of the character described, comprising a plate having an orifice therein, a groove surrounding the orifice and communica'ting with the latter throu bout the perimeter thereof, the edges of t e orifice bevele port in said plate for transmittin kinetic fluid pressure from the orifice and groove, and a port in said plate opening at a face of said plate for transmittin static fluid pressure from one side of said pdate.

6. A device for transmitting static and kinetic fluid pressures, comprising means having an orifice therein, a groove communicating with'the orifice throughout the perimeter thereof," a port communicating with said groove for transmitting kinetic fluid pressure therefrom, and ports in said plate openin at opposite faces of said transmit static fluid pressure there om accordin to the difectfim'fi'f flbw of the fluid the orifice. 1

7. A device for transmitting static and kinetic fluid pressure, comprising integral means having an orifice therein and a continuous with sa1d orifice throughout the perimeter I of the latter, said means havin a port communicatin with said groove or transmittingl kinetlc fluid pressure, and a port in sai transmitting static fluid 8. A device for transmitting kinetic fluid pressure, adapted for introduction into piping and ressure.

stat1c and hav ng an orifice therein, a ort in said means communicating with -said orifice for transmittln kinetic flllld pressure, said means having provislon for transmitting static fluid pressure through said means from either side thereof according to the direction of flow of fluid through the orifice.

9. A device for transmitting static andv a pairozf independent ports in said member and opening at opposite sides of said memfplate to oove in said means communicating member opening at a face thereof for comprising means bar for transmitting static fluid pressure accordin to the direction offlow of fluid throng 1 1 the orifice.

0. A device of thecharacter described comprising an orificeunit having a groove constituting a protected cavity surrounding the orifice in said unit for establishing a standard of pressure, and ports through the unit providing difierentia pressures.

11. A device of the character described comprising an orifice unit having an intermediate groove constituting a protected cavity surrounding the orifice in said unit for establishing a low pressure at the point of highest velocity, and ports through the unit providing difierential pressures.-

12.---;A device of the character described comprising an orifice. unit having a (groove intermediate its exposed faces aflor ing a protected cavity surrounding the orifice in said unitfor establishing kinetic pressure at the point of highest velocity, and ports through the unit providing diflerential pressures. 1

13. A device of the character described comprising an orifice unit having a substantially enclosedgroove affording a protected cavity surrounding the orifice in said unit for establishing and transmitting kinetic pressure at the point of highest velocity, and subsidia ports through the unit for. diverting di erential pressures.

14. A device of the character described comprising an orifice unit having a groove aflording a concentric protected cavity around the orifice in said unit for establish; ing and transmitting kinetic pressure at the point of highest velocity, and subsidiary ports throng pressure.

15. A device of the character described comprising an orifice unit having a groove aflording a concentric protected cavity around the orifice in said unit for establishing and transmitting kineticcpressureat the point of highest velocity, said orifice havin its edges flared to provide a sharp line 0 juncturewith the cavity, and subsidiary ports through the unit for diverting static pressure. a

16. A device of the character described the unit for diverting static comprisin a diflerential pressure unit hav-]' ing an ori ce embodied therein for establishing a varying working standard of pressure which is correlated to andvaries coincidentally with other but different varying pressures associated, with said unit, a groovelike cavity in said unit forming a protected pressure transmitting lport openly communi cating with and com etely surrounding the aforesaid orifice at t e point of hi hest velocity, and means for establishing, iverting and transmitting static pressure.

17. A device of the character described comprising a difi'erentialpressure unit havdiverting and transmitting ort openly eommunicatmg with and comp etely surround-' inggthe aforesaid orifice for establishing a su rdinate variable ressure at the point of highest velocity an for. transmitting the same; and auxilia ports associated with said unitfor esta lishing, diverting and transmitting other variable pressures of difl0 ferent operating standards.

In testimony whereof, I have eigned my name to this specification.

v FRANCIS H. BROWN. V 

